<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <!-- pre:保持原样输出
           v-pre:保持原样输出
    -->
      <pre>
        1
        2
     </pre
      >
      <div v-pre>{{msg}}</div>
    </div>
    <script src="./vue.js"></script>
    <script>
      new Vue({
        el: '#app',
        data: {
          msg: 'hello'
        }
      })
    </script>
  </body>
</html>
